About 98 million pounds of cancer-causing chemicals and highly corrosive acids were used in thousands of Los Angeles County oil wells over the past four years, potentially exposing nearby residents to public health risks, according to a study released last week by an anti-oil drilling coalition.

Tesla was under investigation by the Securities and Exchange Commission for a year over how it was selling its Model 3 sedan, yet the maker of electric vehicles never told investors about it, according to a report. The company may still be under a separate SEC investigation.

Federal regulators have found fresh evidence of an “ongoing oil release” at the site of a 13-year-old oil leak in the Gulf of Mexico, where chronic sheens often stretch for miles off Louisiana’s coast, according to government lawyers.